benchmarking: add missing loguru logger import to process.py

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: rlratzel <rratzel@nvidia.com>

Author: rlratzel

benchmarking/runner/process.py

@@ -25,6 +25,7 @@
 from pathlib import Path
 from typing import Any
 
+from loguru import logger
 from rich.live import Live
 from rich.panel import Panel
 from rich.text import Text